How to set OpenJPEG flags in FFmpeg

[Aegwyn11]

Does anyone know how/if you can set OpenJPEG flags in FFmpeg? I need to encode some motion Jpeg2k clips and FFmpeg just uses the default OpenJPEG settings, which are lossless, which isn't what I want.

I tried using the frames_to_mj2 OpenJPEG app directly and it works for small files, but doesn't seem to be able to open my 5 minute (~33 GB) YUV file.

[Reimar]

It's the same options as for all other codecs: -q and -compression_level.
Though what seems to be slightly special is that it looks like -q only selects lossless (if 0)/lossy (otherwise).
It does have a few more options though, but hopefully you won't need them since the only way to know about them seems to be by reading the source code...

[Aegwyn11]

Resurrecting an old thread...

Thanks for the response. I was able to get it working by using -compression_level. If I set -q 1, the quality looked like crap. Using -q 0 and setting -compression_level (or omitting -q) had expected results.

Thanks again.